Sprint has always had that feature man   I use it all the time

Received a call, female, said I had been chosen to receive a free WIFI / In Home Security System if I agreed to place a sign in my front yard. I said No thanks, my 6 dogs have been doing a wonderful job protecting my home and the entire neighborhood for years, I hung up....

I try to have some fun with these repeat offenders - who after the first BS call are added to my spam caller contact list with their own ringtone. This one isn't any fun as when you answer however you choose, they hang up immediately - probably not even a human on the other end.
The ones that sound like indians calling about your nonexistent windows computer issues, they are fun to mess with, but so far my best time to keep them on is about a minute or less - probaaly cause I am just really annoying and obnoxious.

so tired of getting these calls. no message ever left. i know do not know anyone in california.

Called my work cell number while I was in the shower. No message. Tried to call back but got a busy signal.